Tire air valve



.May 10,1927. 1,628,441

A. L. soREsl TIRE AIR VALVE Filed NOV. 23. 1926 l a y 5.5 Srwz PatentedMay 10, 1927.

UNITED STATES ANGELO L. SORESI, 0F NEW YORK, N. Y.

TIRE AIR VALVE.

Application lcd November 23, 1926. Serial No. 150,308.

The present invention relates to improvements in tire air valves, andhas for an object to provide a valve structure which will be leak-proofto a considerably higher degree than existing forms now employedgenerally in practice; and in which the expense incident to manufactureis reduced, spring and rubber parts, stems and guides eliminated.

Another object of the invention consists in providing a more durablevalve construction in which the necessity for renewing the valve insideswill not arise.

Witi the foregoing and other objects in view, the invention will be morefully described hereinafter', and will be more pai'- ticularly pointedout in the claims appended hereto.

In the drawings, wherein like symbols refer to like or correspondingparts throughout the several views.

Figure 1 is a fragmentary longitudinal section taken through an innertube and the improved tire valve structure showing the valve in theclosed osition.

Figure 2 is a similar view with the valve open, and

Figure 3 is a perspective view of the valve body above.

Referring more particularly to the drawings 4 designates generally aninner tube which is adapted to tit within the casing or shoe (notshown). y

The tube 4 is provided with the valve stein 5, the connection being madein any appropriate manner, as for instance by providing the foot of thevalve stem or tube 5 with an outstanding flange 6 to it against theinner wall of the inner tube 4,`the valve stem being inserted through anopening in the inner tube made to receive same.. The wall of the innertube adjacent this opening is clamped Between the Harige 6 and the ring7 internally threaded to engage with the external threads 8 upon thevalve stem 5 near the base portion.

The valve stem 5 may be of a usual external configuration with the upperreduced I and externally threaded end 9 for receiving the small screwcap (not shown) now quite generally in use. The base threads 8 may alsosubserve the further function of receiving the large dust cap (notshown).

Within, the construction of the valve stem 5 differs 1n accordance withthe present invention, there being generally a passage extendinglongitudinally or axially of the stem in communication at its 'base endwith the interior air chamber of the inner tube 4 and opening outwardlyto the atmosphere whereby to receive the nozzle of an air hose ltoinflate the tire. The longitudinal or axial opening is provided at thebase portion by an enlarged chamber 10 having the inner portion of itsinternal wall threaded, as indicated at 11 to admit of the externallythreaded plugl 12 being engaged within the chamber. This plug forms apartition or diaphragm at an intermediate portion of the chamber, accessbeing had from one end of the chamber to the other through one or moreports13 in the plug 12.

As the threads 11 are preferably cut directly in the Wall of the chamberl0 and are continued only a distance over slightly half the length ofthe chamber, the adjacent Unthreaded blank cham'ber wall will act as astop to arrest the further axial movement of the plug 12 and also toform an abutment against which the plug may be tightly secured` so asloavoid its retrograde movement in use.

Outwardly of the chamber is a longitudinal passage 14 of smallerdian'ieter thereby forming a shoulder 15 at the outer end of the chamber10. The inner portion of the passage 14 is widened or flared in asection or frustum of a cone to provide the valve seat 16 which may beground, access for this purpose being had through the cliainbered end 10prior to assembling the valve and plug 12. The valve is indicatedgenerally at 17 and is preferably made of copper or some other materialpossessing a high ductility and resiliency. This valve body 17 isfrustoconical in forni, hollow within and provided with an open basewhich is adapted to engage tlie plug l2 in the open position of thevalve, shown in Figure 2. The truncated apex or nose 18 is blunt andthickened to provide strength and to impart to the exceedingly thin andtapered skirt 17 an appropriate backing. It will be noted from Figures 2and 3 that the cross section of the valve body tapers from the thickenednose 18 downwardly in all directions through the skirt to an exceedinglyline base, which is provided with the notches or ports 19 for permittingthe incoming air to pass to the port 13 in the plug 12.

In the use of the device the internal air pressure within the inner tube4 will normally have access to the hollow inter1or of the valve bodythrough its open base and consequently the valve will be held ti ghtlagainst its scat 1G, as shown in Figure l. he contact is a metal tometal one, no rubber bein nnployed. 'The apron or skirt 17 is yielcabledue to the material employed and to the thinness thereof. which willadmit of dispensing with rubber, while securing an accurate seating at'the valve throughout all of its extensive frustdconical area. erliaps,a. copper alloy might be preferred in order to increase the inherentresiliency to enable the skirt or apron to return to its normal position of shape in readiness for proper reseat ing after the valve hasbeen once opened. A permanent deformation ot' the valve is renderedimpracticable. This deformation is further prevented by the taperingcharacter of the skirt or apron 1T and the presence of the thickenednose i8 which acts as the backing before referred to.

It will be noted that the conical valve member is oi appreciably greaterlength than the tapered valve seat 1G and that when said valve member isin its closed position as seen in F ig. l of the drawings, the thiniexible large diameter wall section of the hollow valve member projectsbeyond the shoulder 15 formed in the valve stem at the inner end ot' theseat IG. of the valve expansibly yields under the air pres-sure from thetire tube acting against the inner surface ot the valve Wall, and forcesthe outer surface of said wall unilormlv into positive contact againstthe shoulder 15 at its juncture with the valve seat, thus producing anabsolutely air tight seal of the passage through the valve stem withoutthe use of packing rings or additional manually adjustable partscoacting with the valve member.

I have illustrated and described a preferred and satisfactory embodimentof my invention, but it is obvious that changes may be made thereinwithin the spirit and scope thereof as defined in the appended claims.

lVhat is claimed is:-

l. A tire valve comprising a valve stem provided with an air passagehaving a metallic valve seat intern'iediate ofi its ends and a hollowmetallic valve member arranged in said passage` said valve member beingopen at one end and having a wall section gradually decreasing inthickness to said open end thereof and expansibly yield able underinternal air pressure in the closed position of the valve to maintain anair tight rlhus this thin wall section seal between the outer surface ofsaid wall and the valve seat.

2. A tire valve comprising a'stem having an air passage formed with afrustro-conical valve seat intermediate of its ends,y and a hollowmetallic conical valve member in said passage, said valve member havinga relatively thick blunt apex end and the wall of said member graduallydecreasing in thick ness to its opposite end, said latter end of thevalve member being open to receive the tire pressure acting internallyupon the wall of said member to move the same to closed position on thevalve seat, and the relatively thin section of the wall ot said memberat the o en end thereof expansibly yielding under tlie internal airpressure to maintain an air tight seal between the outer surface of saidWall section and the valve seat.

3. A tire valve comprising a stem provided with an air passage having ametallic valve seat intermediate of its ends and an enlarged sectionforming a shoulder at one end of the valve seat, and a hollow metallic'valve member in said passage open at one end to receive the tirepressure and having a relatively thin yieldable wall section adjacentthe open end thereof, said valve member being of greater length than thevalve scat and said wall section projecting beyond said shoulder in theclosed position of the valve, said wall section expansibly yieldingunder the internal air pressure whereby the outer surface of said wallsection is urged by the air pressure into air tight contact against saidshoulder.

Ll. A tire valve comprising a stem having an air passage provided with afrustro-conical valve seat intermediate of its ends and a shouldersurrounding the valve seat at the larger end thereof, stop means spacedfrom said shoulder, and a hollow metallic conical valve member ofgreater length than the valve seat, said valve member having a thickenedblunt apex and the wall of said valve member gradually decreasing inthickness to its other end, and the wall section of said member adjacentthe latter end thereof being resiliently yieldable, said end of thevalve member being open to receive the tire pressure whereby said memberis urged to closed position upon the valve seat, and said thin wallsection ot the wall member expansibly yielding under the internal airpressure to maintain the outer surface ot said wall section in air tightcontact against said shoulder.

In testimony that I claim the foregoing as my invention, I have signedmy name hereto.

ANGELO L. SORESI.

